论文部分内容阅读
利用３６块落叶松一样树混交林标准地调查资料，研究其幼龄期林分Ⅰ级木单位面积株数与林分密度之间的关系，结果表明：Ⅰ级木的株数并非随密度的增加而直线递增，而是趋向“二阶常数”分布，且在同一年龄阶段，在较低的密度范围（２３２５～４８００株／ｈｍ２）或较高的密度范围（４８０１～６７５０株／ｈｍ２）．Ⅰ级木的株数变动幅度不太大。
Based on the standard survey data of 36 mixed larch mixed forests, the relationship between the number of first grade wood units per unit area and stand density was studied. The results showed that the number of grade Ⅰ wood did not increase with the increase of density But tends to be “second-order constant” with a lower density range (2325-4800 plants / hm2) or a higher density range (4801-6750 plants / hm2) at the same age. Grade Ⅰ wood number of changes is not too large.